﻿/* Yet Another Forum.net
 * Copyright (C) 2006-2012 Jaben Cargman
 * http://www.yetanotherforum.net/
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
namespace YAF.Core.Tasks
{
	using YAF.Types.Interfaces;

	/// <summary>
	/// Automatically cleans up the tasks if they are no longer running...
	/// </summary>
	public class CleanUpTask : IntermittentBackgroundTask, ICriticalBackgroundTask
	{
		#region Constructors and Destructors

		/// <summary>
		/// Initializes a new instance of the <see cref="CleanUpTask"/> class.
		/// </summary>
		public CleanUpTask()
		{
			// set interval values...
			this.RunPeriodMs = 500;
			this.StartDelayMs = 500;
		}

		#endregion

		#region Properties

		/// <summary>
		/// Gets or sets TaskManager.
		/// </summary>
		public ITaskModuleManager TaskManager { get; set; }

		#endregion

		#region Public Methods

		/// <summary>
		/// The run once.
		/// </summary>
		public override void RunOnce()
		{
			// look for tasks to clean up...
			if (this.TaskManager == null)
			{
				return;
			}

			// make collection local...
			var taskListKeys = this.TaskManager.TaskManagerInstances;

			foreach (string instanceName in taskListKeys)
			{
				IBackgroundTask task;

				if (this.TaskManager.TryGetTask(instanceName, out task))
				{
					if (!task.IsRunning)
					{
						this.TaskManager.TryRemoveTask(instanceName);
						task.Dispose();
					}
				}
				else
				{
					this.TaskManager.TryRemoveTask(instanceName);
				}
			}
		}

		#endregion
	}
}